Feature policy: Add basic algorithm for supporting frame policies.

third_party/WebKit/Source/core/dom/SecurityContext.cpp

Index: third_party/WebKit/Source/core/dom/SecurityContext.cpp
diff --git a/third_party/WebKit/Source/core/dom/SecurityContext.cpp b/third_party/WebKit/Source/core/dom/SecurityContext.cpp
index 7deb8ab7489f40eab42a8053545b4c5a5d97cf50..efbb7d00dbe4b6d9fdba4d3098a1dc0c7c18d85d 100644
--- a/third_party/WebKit/Source/core/dom/SecurityContext.cpp
+++ b/third_party/WebKit/Source/core/dom/SecurityContext.cpp
@@ -103,8 +103,10 @@ void SecurityContext::setFeaturePolicyFromHeader(
     const WebParsedFeaturePolicyHeader& parsedHeader,
     FeaturePolicy* parentFeaturePolicy) {
   DCHECK(!m_featurePolicy);
-  m_featurePolicy = FeaturePolicy::createFromParentPolicy(parentFeaturePolicy,
-                                                          m_securityOrigin);
+  // TODO(iclelland): Use the frame owner properties here to pass the frame
+  // policy, if it exists.
+  m_featurePolicy = FeaturePolicy::createFromParentPolicy(
+      parentFeaturePolicy, nullptr, m_securityOrigin);
   m_featurePolicy->setHeaderPolicy(parsedHeader);
 }